Which of the following statement is correct ?

Options

A. Hydration energy of alkali metal ions increases down the group
B. Solubility of sulphates of II A group decreases down the group
C. Li does not form nitride on burning in air
D. except `Li_(2)CO_(3)` all the carbonates of alkali metals decompose on heating

Answer

2

Explanation

`(1)` Hydration energy of decreases down the group as the size of the ion increases.
`(2)` Solubility `BaSO_(4) lt …….. lt BeSO_(4)`
`(3)` Li form `Li_(3)N`
`(4) Li_(2)CO_(3)` decompose on heating